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Eli F3-RES 2m

Product Code: ELI
 (7 reviews)

Price: $213.73

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Description

The Eli F3-RES is a very beautiful high performance F3-RES model from Eastern Europe. With attractive elliptical flying surfaces (hence the name) and a very long tailboom it flies as well as it looks. The Eli model won all three Slovak competitions in F3-RES in Slovakia in 2020. It was 4th place in Austrian F3-RES nationals and won E-RES once. Eli is made from very accurately CNC and laser cut balsa with lightweight wound tubular carbon booms for the main spar and tailboom, giving excellent strength and light weight.

The Eli F3-RES design philosophy, as stated by the manufacturer is "This model is made for more dynamic flying which you know from F3J and F5J, it is not for standing in the wind. Whole conception is adapted to this fact. There are tubes for ballast about 100 g in the wing."

The balsa and ply parts are cleanly laser and CNC cut. The fuselage consists of a wooden (plywood/balsa) pod and a light weight tapered carbon tailboom with a balsa tailplane mount. The fin is fixed to the tailboom and the tailplane is removable. Both the fin and the tailplane are cut from a high quality lightweight balsa. The wing is connected to the fuselage using a through joiner. This makes for fast and easy assembly at the field as the wing is retained by magnets - there is nothing to screw. The wing main spar is a tapered carbon tube, which provides excellent strength and very light weight. Riblets ensure the covering material follows the airfoil contour accurately. There are two large spoilers for safely exiting thermals and precise landings.

The Eli can be built fast and accurately without any complications. The kit contents include all the necessary parts to build this sophisticated model easily, including pre-bent leading edge parts and a wing rib alignment jig. The well selected balsa and ply parts are cleanly laser cut and the wound carbon spars are light and well made, with the tip spars tapered. All the control parts and small accessories are included. The kit comes with parts to allow the model to be built as a pure glider or an electric glider. However the internal width is only about 23mm at the nose so installing an outrunner will be a squeeze.

The kit includes a professional quality full size plan with isometric views and a beautifully illustrated English build manual. Also see this excellent photo build log as an additional construction guide.

This is one of the nicest F3-RES kits we have seen and is highly recommended.

(C) 2021 Neil Stainton



Eli F3-RES Specifications
Wing span 2.0 m 78 in
Wing area 34.7 dm2 538 sq in
Length 120 cm 47.4 in
Flying weight from 420 g 14.8 oz
Wing loading 12.1 g/dm2 4.0 oz/sq ft
Aspect ratio 11.3
Wing airfoil AG24 modified
Dihedral (EDA) 12.0º
Spinner Diameter 30 mm
Centre of Gravity 75-78 mm from wing leading edge
Controls Rudder, elevator, spoilers


Eli F3-RES Typical Weights
Bare structure 290 g 10.2 oz
Covering 50 g 1.8 oz
Total structure 340 g 12.0 oz
Receiver 6 g 0.2 oz
Rudder servo 5 g 0.2 oz
Elevator servo 5 g 0.2 oz
Spoiler servos (2) 10 g 0.4 oz
Battery 54 g 1.9 oz
Flying weight 420 g 14.8 oz


Recommended RC
Rudder & elevator servos Blue Bird BMS-101DMG, Blue Bird BMS-101HV, KST X06
Spoiler servos Blue Bird BMS-101DMG, Blue Bird BMS-101HV, KST X06
Receiver 4 or 5 channel receiver to match your transmitter
Battery Radient 1S 700 mAh LiPo, Dream-Flight 300 mAh 4.8V NiMH, HyperFlight 650 mAh 4.8V NiMH, Dream-Flight 700 mAh 4.8V NiMH, 1S 2600 mAh Li-Ion, 2S 300-600mAh LiPo


Control Throws
Rudder 17 mm each way
Elevator 12 mm up & down
Spoilers 80º up
Spoiler mix 3 mm up elevator with 45º up spoiler


Electric Powertrain Recommendations
Hacker A10-7L geared 4.4:1 3S 450mAh LiPo, 12x8, 13x8
DYS D2225-17 2S 450mAh LiPo, 9x6, 10x5
DYS D2225-17 3S 450mAh LiPo, 7x3.5, 7x4, 8x4
ADH300L / MM1914-1100 Front Mount ** 2S 450mAh LiPo, 11x6
ADH300L / MM1914-1100 Front Mount ** 3S 450mAh LiPo, 8x6, 9x5
** This motor will need a small widening of the internal fuse space to fit.


Reviews 7  


 Review by:

Eli

nicely presented kit with excellent plan. took 8 days to build and fit motor to F5 spec with Hacker A7 geared motor- plan shows conversion and 2 motor bulkheads are included with different hole spacings. went together very well though tailplane pylon is fiddly. wing tips are very weak and I braced them with bent wire at T.E. and carbon rod into mainspar. turned up some stainless ballast bars to give an extra 100g and have now flown with and without ballast- very impressive all-round. looking forward to some competitions.


 Review by:

Eli F3-RES

Truly excellent kit, the laser cutting being the best I have seen. With an eliptical wing plan and tapered carbon fibre tube spars the laser cutting had to be spot on - and it was, everything fitted. All materials are top quality. Mine came out slightly heavy at 475 grams but I made no effort to keep the weight down as I wanted to use it more as a light wind slope soarer. I flew it today in a 'bit of a breeze' and as I suspected in the conditions, the performance was better with the ballast fitted. In very light air it will be fine without the ballast - it flies very well indeed. Spoilers are very effective too. I may even invest in a bungee!
Very highly recommended and of course top service from Neil.


 Review by:

Eli - F3-RES kit

This is simply an outstanding kit and a complete joy to put together. The full size plan is a work of art and should be framed and hung up in the workshop. Quality of everything is superb and as long as you have a degree of building ability will not be a problem. Having said that, with more than fifty years now of making model airplanes, there were still a couple of mistakes made. One too embarrassing to mention. And if building another one, half a dozen things I would do differently. But on the whole, simply outstanding. Finished model looks lovely, slightly heavier than planned at 447 gm, and ready for maiden flight, hopefully soon. Build one, you will love the experience as I did. GM.


 Review by:

FIRST IMPRESSIONS OF KIT - EXTREMELY GOOD

Not a lot to report just yet (only just purchased and delivered the next day, thanks Neil!) but a close study today of the kit contents, the plan and instruction sheet, and the Google Album as well, reveals an extremely good quality product, which should go together without fuss.

Looking forward to building and eventually flying.


 Review by:

Eli F3 RES kit

Kit arrived as other items before within three days. this is a really well made kit. I won't be starting on it just yet as other projects in hand. Thanks Hyperflight.


 Review by:

Amazing Order Turnaround

Ordered late afternoon and delivered just over 24 hours later. I've looked longingly at the plan and the kit components but am not yet ready to start building. The quality of the balsa and the part-cutting is very impressive. The English translation of the build instructions is a little challenging but I think I've worked it all out. "Controll turning of the wing, on tip-1 negative 1-2mm ......" was particularly challenging but I'm assuming that it really does mean washout.
Hyperflight have a fabulous selection of kits and their response to customer orders is second-to-none. I know that obtaining balsa kits from Europe is very difficult at the moment and I hope that will be resolved because I look forward to building more of these.

HyperFlight comment: Yes it means washout.


 Review by:

Beautiful Kit

Beautiful kit, cutting and wood. First class, fast delivery and very well packaged. A1.
A pleasure to build. Thank you HyperFlight.


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